PSLE
Fiona and Nora made some blueberry muffins and banana muffins. Fiona made 68 more blueberry muffins than banana muffins. Nora made 158 more banana muffins than blueberry muffins. The total number of blueberry muffins made up 45% of the total number of muffins they made. How many banana muffins did they make altogether?

Number of banana muffins		Number of blueberry muffins
55%		45%
Fiona	Nora	Fiona	Nora
1 u	1 p + 158	1 u + 68	1 p

Fiona
Number of banana muffins = 1 u
Number of blueberry muffins = 1 u + 68

Nora
Number of blueberry muffins = 1 p
Number of banana muffins = 1 p + 158

Number of banana muffins in percent
= 100% - 45%
= 55%

1 u + 68 + 1 p = 45% --- (1)
1 u + 1 p + 158 = 55% --- (2)

(2) - (1)
55% - 45% = 158 - 68
10% = 90

1% = 90 ÷ 10 = 9

Number of banana muffins that they made altogether
= 55%
= 55 x 9
= 495

Answer(s): 495